A winter weather advisory was put into effect for mid-Missouri Friday morning through Saturday night due to freezing drizzle.

Columbia Public Works said 25 pieces of equipment were on Columbia streets since 10:30 spreading salt to fight freezing drizzle and fog. It said its full crew will be on duty overnight.

Some students had to wait until 9:30 p.m. for a bus to pick them up. Community Relations Director Michelle Baumstark said it would not have been possible to dismiss early given the time frame and not advisable as roads had not been treated. Columbia Public Schools said all of the students who were stuck at school were safe and supervised while they waited for buses. Parents were asked to call their child's school before going to pick their kids up.

Baumstark said a few buses also were involved in wrecks Friday. Buses slid off roads into trees and neighborhood mailboxes. Some of these accidents required sending alternate buses to pick up students and complete the routes.

Fulton Public Schools said buses picked up all of its students by 9:30 p.m.

All Jefferson City Public Schools buses were off the road or made their final stops.

Columbia Connect said Para-Transit services stopped by 2 p.m.

Columbia Police Department said it had cleared approximately 54 car collisions since 11 a.m. Officers said 25 collisions were still holding at 4 p.m.

The Jefferson City Police Department reported a total of 24 car collisions between 11 a.m. and 1:30 p.m. Officers said they are prioritizing crashes with injuries ahead of other accidents.